conventicle

English Thesaurus

1. a building for religious assembly (especially Nonconformists, e.g., Quakers) (noun.artifact)

hypernym	:	house of god, house of prayer, house of worship, place of worship,
definition	:	any building where congregations gather for prayer (noun.artifact)

2. a secret unauthorized meeting for religious worship (noun.group)

hypernym	:	get together, meeting,
definition	:	a small informal social gathering (noun.group)